Mining-drill.



PATENTED NOV. 27, 1906.

F. A. ENGLISH.

MINING DRILL. APPLICATION FILED MAY26, 1905- lmwm FAEnylzLsh attonwy rumuonms PETERS cm, WASHINGTON, 1:. c4 7 UNITED STATES PATENT OFFICE.

MINING-DRILL.

Specification of Letters Patent.

Patented Nov. 27, 1906.

Application filed May 26, 1905. Serial No. 262,389.

To (til whom, it may concern.-

Be it known that I, FEEDERIoK ALLEN ENGLISH, a citizen of the UnitedStates, re siding at Shamokin, in the county of Northumberland and Stateof Pennsylvania, have invented new and useful Improvements inMining-Drills, of which the following is a specification.

My invention relates to mining-drills; and its primary object is toprovide a device of this character wherein the feed of the drill tube orbar may be varied and regulated at the will of the operator, whereby tocompensate for the different densities of the material being drilled andto obviate any liability of the drill or bar being broken or distorted.

A further object of the invention is to pro vide a device of thecharacter stated wherein the cranks of the power means may be elevatedto different heights to avoid the same from coming into contact with theground when drilling a hole at a point adjacent thereto, therebyadapting the drill for boring holes at points in close proximity to thebase of the vertical wall.

The invention consists in the construction, combination, and arrangementof parts hereinafter fully described, claimed, and illustrated in theaccompanying drawings, which disclose the preferred form of myinvention, and in which- Figure 1 is a side elevation of a drillconstructed in accordance with my invention. Fig. 2 is a centrallongitudinal section on the line 2 2, Fig. 1, looking in the directionof the arrow; and Fig. 3 is a transverse sectional view on the line 3 3,Fig. 1. Fig. 4 is a perspective view of a fragmentary portion of one endof the boxing and a detail perspective view of the brake-lever.

Referring to the drawings by referencenumerals, 1 indicates the boxingof the drill,

the same being circular in cross-section, fully open at its ends, andprovided with screwthreads 2. I The boxing has two diametrically-opposedand laterally-projecting bearing-lugs 3, which are received by bearingsin a yoke 4. This yoke is secured to a rod 5 in the usual manner,whereby the drill may be supported in applied position.

A feed-block 6 is rotatably mounted with in the boxing 1 and is providedwith a centrally-threaded bore for the reception of the usual tube orbar 7, having an external longitudinal groove 8. The feed-block isprovided with a centrallyarragned annular flange 9 and is rotatablysecured within the casing 1 by means of disks 10. These disks arethreaded to engage the threads 2, whereby they are removably secured inapplied position, and are provded with central bores 11, through whichproject the ends of the feedblock 6. These bores are of a diametergreater than that of the feed-block 6, whereby no resistance will beoifered to the rotation thereof. The inner faces oftlie disks 10 areprovided with. raceways, and washers 12, mounted upon the feed-block oneither side of the flange, are also provided with raceways, (designated13.) Ball-bearings 14 are mounted between the disks 10 and washers 12 insaid raceways, whereby the feed-block may be rotated within the boxingwith a minimum amount of friction.

The drill tube or bar 7 is rotated by the means hereinafter set forth,and the feed of said tube or bar may be regulated and controlled at thewill of the operator. It is apparent in view of the threaded connectionof the bar or tube 7 with the feed-block 6 that if the block is heldagainst rotation said tube or bar will be fed forward, that if saidblock is free to rotate the tube or bar will not be fed forward, andthat the degree of the feed thereof can be varied by causing the blockto revolve under a greater or lesser friction. To accomplish this, Isecure to the projected ends of the feed-block friction-disks 14 Abrake-lever 15 is secured to one end of the casing 1 by means of athumb-screw 16 and between two upstanding lugs 17 to prevent it fromhaving lateral movement. This lever projects beyond one end of thecasing 1, and said projecting portion is composed of spring metal. Tothe extremity of the lever 1 is secured a brake-shoe 18, which isadapted to be brought into engagement with the periphery of one of thedisks 14" when pressure is brought to bear upon the projecting end ofthe lever 15.

It is apparent that the brake-shoe can be brought into such frictionalengagement with one of the disks that the speed of rotation of thefeed-block can be regulated to control the feed of the drill toaccommodate for the different densities of the material being drilled.

Adjustably mounted upon lugs 22, projecting laterally from one end ofthe casing 1 and held' in adjusted position thereon by means of nuts 23mounted upon the projecting threaded ends of the lugs 22 is agear-casing 19,

IIO

Stud-shafts 24 are journaled at diametrically opposite points in thecasing and have keyed or otherwise secured to their inner ends gears 25.These gears are adapted to mesh with a gear 26, splined on the bar ortube 7 through the medium of a feather (not shown) fitting in the groove8 of the tube of the bar 7. The outer ends of said shafts 24 areprovided with crank-handles 27, whereby the drill may be manuallyoperated.

If it is desired to drill a hole in a vertical wall at a point adjacentto its base and the distance between the base and the point where thehole is desired to be drilled is less than the length of thecrank-handles 27, it is a parent that it will be impossible to operate te machine, as the handles would be brought into engagement with thebase. In order to overcome this, the gear-casing may be revolved in amanner that is apparent so as to present one of the crank-handles at apoint where it may be freely operated without danger of coming incontact with the ground.

It is apparent that by securing the frictiondisks 1.4 and thebrake-lever 15 exteriorly of the casing the brake-lever can be readilyreplaced. without removing the feed-block from the boxing should thesame become unfit for use.

From the foregoing description, taken in connection with theaccompanying drawings,

the construction and mode of operation of the invention will beunderstood without a parting from the spirit or sacrificing any of theadvantages thereof.

Having thus fully described the invention, what is claimed as new is 1.In a mining-drill, a boxing, a feed-block rotatively mounted within saidboxing and I having one of its ends projecting beyond the end of theboxin a friction member mounted exteriorly of t e boxing upon theprojected end of the feed-block, and a brake adapted to be brought intofrictional engagement with said friction member,

2. In a mining-drill, aboxing, a feed-block rotatively mounted withinsaid boxing, a 6 drill carried by said block, lugs projecting laterallyfrom one end of the casing, a gearcasing having one end provided with aplurality of recesses to receive the lugs to adjustably mount thegear-casing upon the first- 6 mentioned casing, and means carried bysaid casing for operating the drill.

3. In a mining-drill, a boxing, a feed-block rotatably mounted withinsaid boxing, a drill carried by said block, lugs projecting 7 laterallyfrom one end of the casing, a gearcasing provided with a plurality ofindentations to receive said lugs, means carried by the gear-casing foroperating the drill, a fric tion-disk carried by one end ofthe'feed-block, 7 and a brake-lever carried by the casing and adapted tobe brought into frictional engagement with said disk.

4. In a mining-drill, a boxing, a feed-block rotatably mounted withinsaid boxing and 8 having its ends projecting beyond the ends of theboxing, friction-disks mounted upon the projecting ends of the block,and. a brake adapted to be brought into frictional engagement with oneof said disks. 8

In testimony whereof I affix my signature in presence of two witnesses.

FREDERICK ALLEN ENGLISH.

Witnesses:

M. B. KRAMLIOH, JOHN C. YORDY.

